Air conditioner pipeline switch base machining method

Abstract

The invention relates to the technical field of air conditioner pipeline switch base manufacturing methods, in particular to an air conditioner pipeline switch base machining method which comprises the steps that a multi-station intelligent cold header drives a punching rod to move, the punching rod extrudes a blank in a die, the blank is deformed to achieve the shape consistent with that of the die, a blind hole or a through hole is punched in the returned material, and the blank is machined. According to the method, the aluminum bar wire is subjected to punch forming through the cold header, and the blind hole or the through hole is punched in the blank, so that the complexity of traditional inner hole machining is eliminated, and the problem that the critical dimension precision is difficult to control is solved; the machining time is effectively shortened, the size precision is ensured, and the machining efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of methods for preparing a switch seat for an air-conditioning pipeline, and in particular to a method for processing a switch seat for an air-conditioning pipeline. Background Art

[0002] At present, the processing process of the air-conditioning pipeline switch seat uses aluminum rods as raw materials, and the processing process is as follows: ① Cut the Φ18 aluminum rod length: 36mm (leave 0.5mm finishing allowance at both ends); ② Rough machining of the outer circle and inner hole size (leave 0.5mm finishing allowance); ③ CNC finishing of the outer circle, plane, inner hole size of one end and tapping; ④ Turn around and CNC machining the outer circle, end face, inner hole size of the other end and tapping; ⑤ Cleaning, blowing, packing and storage. The traditional processing method has a large number of processing tools, high processing technology difficulty, and high technical requirements for operators. Due to the complex process, it is difficult to stably control the product accuracy, the product qualification rate is low, and the material utilization rate is not high. Therefore, a new processing method is urgently needed to improve this. Summary of the invention

[0003] In view of the defects in the prior art, the present invention provides a method for processing an air conditioning pipeline switch seat, which is characterized by comprising: using a multi-station intelligent cold heading machine to stamp a blank, the multi-station intelligent cold heading machine drives a punch to move, the punch squeezes the blank in the die, so that the blank is deformed to reach a shape consistent with the die, and a blind hole or a through hole is punched out in the blank to obtain a switch seat blank;

[0004] Use a turning tool to turn the internal threads of the holes punched out of the switch seat blank;

[0005] Finishing the outer surface of the switch seat blank to obtain a molded product, an air conditioning pipeline switch seat;

[0006] Cleaning of molded products.

[0007] As a preferred technical solution, the blank is stamped and formed by a multi-station intelligent cold heading machine, which specifically includes the following steps:

[0008] (1) The round aluminum rod wire is cut by the cooperation of the outer circular knife and the inner circular knife. The aluminum rod wire passes through the through hole of the inner circular knife, and the notch 1-1 on the outer circular knife cuts the aluminum rod wire to obtain a billet;

[0009] (2) Extruding the billet in the No. 1 die through a shaping punch to shape the billet;

[0010] (3) The blank of the 2# die is squeezed by the positioning punch, and the blank is further shaped and positioned to form a hexagonal preform of the blank;

[0011] (4) The blank of the 3# die is squeezed by a stretching punch, the blank is stretched, and the blind hole at the large end of the blank is positioned with a small hole, including preforming of a groove;

[0012] (5) Extruding the billet of the 4# die by the shaping groove punch, the billet groove is secondarily regularized;

[0013] (6) Extruding the blank of the 5# die through the shaping punch, the burrs on the edges of the blank groove are extruded inside the die to remove the burrs;

[0014] (7) The blank of the 6# die is squeezed by a forming punch and holes are formed in the blank.

[0015] As a preferred technical solution, the outer circular cutter and the inner circular cutter are installed on a movable cutting knife cylinder at the feed port of the multi-station intelligent cold heading machine.

[0016] As a preferred technical solution, the blank is placed in 1# to 6# molds in sequence through the clamps provided by the multi-station intelligent cold heading machine, and 1# to 6# molds are all molds that are disconnected from each other from top to bottom.

[0017] As a preferred technical solution, a tap for tapping the blind hole or through hole punched out of the blank is installed on a cold heading machine or a tapping machine.

[0018] As a preferred technical solution, the fine processing of the outer surface of the switch seat blank specifically includes: clamping and fixing the small end of the switch seat blank with the inner hole spring sleeve of the cold heading machine spindle, rough and fine turning the outer circle and end face of the large end of the blank with an external cylindrical turning tool, chamfering one end of the large hole of the large end of the blank with an internal hole boring tool, moving to the second spindle through the clamp of the cold heading machine, clamping and fixing the large end of the blank with the inner hole sleeve of the cold heading machine spindle, turning around and rough and fine turning the end face and outer circle of the small end of the blank, milling a hemispherical groove on the small end of the blank with an alloy milling cutter, and enlarging and chamfering the small hole of the small end of the blank with an internal hole boring tool.

[0019] As a preferred technical solution, cleaning the molded product specifically includes: using ultrasonic cleaning, controlling the pH of the cleaning liquid between 8 and 9, cleaning for 10 minutes, and after the alkaline ultrasonic cleaning is completed, immersing the switch seat in clean water to remove the alkaline water on the surface of the switch seat, then blowing off the moisture on the surface of the switch seat, and finally placing it in a dryer for drying.

[0020] As a preferred technical solution, the model of the multi-station intelligent cold forging machine is 14B6S.

[0021] The beneficial effects of the present invention are embodied in:

[0022] The present invention drives the punch rod to move in a multi-station intelligent cold heading machine, and the punch rod squeezes the bad material in the mold, so that the blank is deformed to achieve a shape consistent with the mold, and a blind hole or a through hole is punched out in the returned material, and then the switch seat blank is fine-processed by a cold heading machine, and finally the molded product is cleaned to remove surface oil and aluminum chips. The present invention uses a cold heading machine to stamp aluminum rods and wires, and punches blind holes or through holes in the blank, eliminating the tedious traditional machine tool processing of inner holes and solving the problem of difficult control of key dimensional accuracy, effectively reducing processing time, ensuring dimensional accuracy, and greatly improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0024] Figure 1 It is a schematic diagram of a structure of a circular external cutter in a top view of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the inner and outer knives from a top view of the present invention;

[0026] Figure 3 It is a schematic diagram of the planed surface structure after processing of the present invention;

[0027] Figure 4 This is a schematic diagram of the 1# mold structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the 2# mold structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the 3# mold structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the 4# mold structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the 5# mold structure of the present invention;

[0032] Fig. 9 This is a schematic diagram of the 6# mold structure of the present invention;

[0033] Fig.10 This is a schematic diagram of the structure of the air conditioning pipeline switch seat of the molded product of the present invention. DETAILED DESCRIPTION

[0034] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0035] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0036] The following is combined with Figures 1 to 10 The present invention is described in further detail:

[0037] Use multi-station intelligent cold heading machine to stamp the blank into shape. Figures 1 to 10 First, a multi-station intelligent cold heading machine is selected. The multi-station intelligent cold heading machine is also called a cold extrusion forming machine. In this embodiment, the model of the multi-station intelligent cold forging machine is 14B6S, and then the outer circular knife and the inner circular knife are installed on the movable cutting knife cylinder at the feed port of the cold heading machine, and the 1#~6# molds are placed in the mold frame of the cold heading machine, and the mold frame is pressed and fixed to fix the mold; finally, the cold heading machine is started, and the motor of the cold heading machine drives the cam to drive the punch mechanism to move, and the punch squeezes the blank in the mold, so that the blank is deformed to a shape consistent with the shape of the mold, and blind holes and through holes are punched out inside the large end and the small end of the blank. After being stamped and formed by the 1#~6# molds, it finally becomes a switch seat blank, wherein the blank is placed in the mold through the clip provided by the cold heading machine, and the 1#~6# molds are all molds that are disconnected from each other from top to bottom. Exhaust is exhausted through the disconnected surface to avoid inflation during the stamping process, which is beneficial to the forming of the blank;

[0038] Use a turning tool to turn the internal threads of the holes punched out of the switch seat blank;

[0039] Finishing the outer surface of the switch seat blank to obtain a molded product, an air conditioning pipeline switch seat;

[0040] Cleaning of molded products.

[0041] Specifically, the multi-station intelligent cold heading machine punches the blank into shape, including the following steps:

[0042] (1) The φ19.2 round aluminum rod wire is cut by the cooperation of the outer and inner circular cutters. The aluminum rod wire passes through the through hole of the inner circular cutter, and the notch 1-1 on the outer circular cutter cuts the aluminum rod wire. Figure 1 As shown in the figure, it is a schematic diagram of the main structure of the circular outer knife. Figure 3 As shown, the blank is obtained as a schematic diagram of the inner knife structure; the blank cross-sectional diameter A is φ19.2, and the blank length F is 16.

[0043] (2) Clamp the blank with the clamp of the cold heading machine and put it into the No. 1 mold. Figure 4The figure shows the schematic diagram of the structure of the 1# die. The blank in the 1# die is squeezed by a shaping punch to shape the blank so that the shape of the blank is adapted to the 1# die.

[0044] (3) The blank after shaping in step (2) is then placed into the 2# mold. Figure 5 As shown, it is a schematic diagram of the structure of the 2# die. The blank of the 2# die is further shaped by extruding the blank through the shaping punch, and the blank is regularized. The diameter C of the large end section of the blank is φ19.2, and the length F is 16;

[0045] (4) The blank after shaping in step (3) is then placed into the 3# mold. Figure 6 As shown, it is a schematic diagram of the structure of the 3# die, and the blank of the 3# die is squeezed by the positioning punch to shape and position the blank;

[0046] (5) After the shaping and positioning in step (4), the blank is placed in the 4# mold. Figure 7 As shown, it is a schematic diagram of the structure of the 4# die. The blank of the 4# die is squeezed by a stretching punch, and the blank is stretched to form a blind hole at the large end of the blank. The blind hole at the large end includes a large hole and a small hole, and then the small hole is positioned;

[0047] (6) The blank stretched in step (5) is then placed in the 5# mold. Figure 8 As shown, the blank of the 5# die is squeezed by a shaping punch, and the burrs on the edges of the blank groove are squeezed inside the die to remove the burrs;

[0048] (7) The blank stretched in step (6) is then placed in the 6# mold. Fig. 9 As shown, the blank of the 6# die is squeezed by a forming punch, the blank is pierced, the large hole and small hole inside the large end of the blank as well as the large hole and small hole inside the small end of the blank are polished, and the size of the inner hole of the blank is recombined to ensure that the smoothness and concentricity of the inner hole meet the process requirements.

[0049] Specifically, the tap for tapping the blind hole or through hole punched out of the blank is installed on a cold heading machine or a tapping machine:

[0050] Use M10×1.25-9H tap to squeeze and tap the large hole at the large end of the blank. The tapping depth D is 7. Continue to refer to the forming switch seat. Fig.10 ,

[0051] Use an M6×0.75-4H tap to squeeze and tap the large hole at the small end of the blank;

[0052] Specifically, the finishing of the outer surface of the switch seat blank includes:

[0053] Use the inner hole spring sleeve of the cold heading machine spindle to clamp and fix the small end of the switch seat blank, use the outer circle turning tool to rough and fine turn the outer circle and end face of the large end of the blank, use the inner hole boring tool to chamfer one end of the large hole of the large end of the blank, move to the second spindle through the clamp of the cold heading machine, clamp and fix the large end of the blank with the inner hole sleeve of the cold heading machine spindle, turn around and rough and fine turn the end face and outer circle of the small end of the blank, use the alloy milling cutter to mill a hemispherical groove on the small end of the blank, and use the inner hole boring tool to enlarge and chamfer the small hole of the small end of the blank;

[0054] Specifically, cleaning molding products include:

[0055] Use ultrasonic cleaning, control the pH of the cleaning liquid between 8 and 9, and clean for 10 minutes. After the alkaline ultrasonic cleaning is completed, immerse the switch seat in clean water to remove the alkaline water on the surface of the switch seat, then blow off the moisture on the surface of the switch seat, and finally put it in a dryer for drying.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A method for processing an air conditioning pipeline switch seat, characterized in that: include: A multi-station intelligent cold heading machine is used to stamp the blank into shape. The multi-station intelligent cold heading machine drives the punch rod to move. The punch rod squeezes the blank in the die, causing the blank to deform to a shape consistent with the die, and a blind hole or through hole is punched out in the blank to obtain a switch seat blank; a turning tool is used to turn the internal thread of the hole punched in the switch seat blank; the outer surface of the switch seat blank is finely processed to obtain a molded product, an air-conditioning pipe switch seat; and the molded product is cleaned.

2. The method for processing an air conditioning pipeline switch seat according to claim 1, characterized in that: The specific steps of using a multi-station intelligent cold heading machine to stamp the blank include: (1) The round aluminum rod wire is cut by the cooperation of the outer circular knife and the inner circular knife. The aluminum rod wire passes through the through hole of the inner circular knife, and the notch 1-1 on the outer circular knife cuts the aluminum rod wire to obtain a billet; (2) Extruding the billet in the No. 1 die through a shaping punch to shape the billet; (3) The blank of the 2# die is squeezed by the positioning punch, and the blank is further shaped and positioned to form a hexagonal preform of the blank; (4) The blank of the 3# die is squeezed by a stretching punch, the blank is stretched, and the blind hole at the large end of the blank is positioned with a small hole, including preforming of a groove; (5) Extruding the billet of the 4# die by the shaping groove punch, the billet groove is secondarily regularized; (6) Extruding the blank of the 5# die through the shaping punch, the burrs on the edges of the blank groove are extruded inside the die to remove the burrs; (7) The blank of the 6# die is squeezed by a forming punch and holes are formed in the blank.

3. The method for processing an air conditioning pipeline switch seat according to claim 1, characterized in that: The circular outer knife and the inner knife are installed on a movable cutting knife cylinder at the feed inlet of the multi-station intelligent cold heading machine.

4. The method for processing an air conditioning pipeline switch seat according to claim 1, characterized in that: The blanks are sequentially placed into 1# to 6# molds through the clamps provided by the multi-station intelligent cold heading machine, and the 1# to 6# molds are molds that are disconnected from each other from top to bottom.

5. The method for processing an air conditioning pipeline switch seat according to claim 1, characterized in that: The tap for tapping the blind hole or through hole punched out of the blank is installed on a cold heading machine or a tapping machine.

6. The method for processing an air conditioning pipeline switch seat according to claim 1, characterized in that: The finishing of the outer surface of the switch seat blank specifically includes: clamping and fixing the small end of the switch seat blank with the inner hole spring sleeve of the cold heading machine spindle, rough and fine turning the outer circle and end face of the large end of the blank with an external cylindrical turning tool, chamfering one end of the large hole of the large end of the blank with an internal hole boring tool, moving to the second spindle through the clamp of the cold heading machine, clamping and fixing the large end of the blank with the inner hole sleeve of the cold heading machine spindle, turning around and rough and fine turning the end face and outer circle of the small end of the blank, milling a hemispherical groove on the small end of the blank with an alloy milling cutter, and enlarging and chamfering the small hole of the small end of the blank with an internal hole boring tool.

7. The method for processing an air conditioning pipeline switch seat according to claim 1, characterized in that: Cleaning of molded products specifically includes: using ultrasonic cleaning, controlling the pH of the cleaning liquid between 8 and 9, cleaning for 10 minutes, and after the alkaline ultrasonic cleaning is completed, immersing the switch seat in clean water to remove the alkaline water on the surface of the switch seat, then blowing off the moisture on the surface of the switch seat, and finally placing it in a dryer for drying.

8. The method for processing an air conditioning pipeline switch seat according to claim 1, characterized in that: The model of the multi-station intelligent cold forging machine is 14B6S.

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